I don't exactly agree with the poster's implication but he's getting at exactly the same point. He's crudely asking if you're a hostile outsider who sees cultural damage as a benefit rather than a cost and are using economic arguments as a cover.
There are sincere economic arguments against immigration that work but this one is based on a lack of understanding of how markets set wages. Immigrants are willing to accept less because the externalities of being in a better country are a bonus (plus prog supplied free stuff)
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